Identify the possible link A in the following food chain.
Green plantInsectFrogAEagle
1. Rabbit
2. Wolf
3. Cobra
4. Parrot
Identify the likely organisms (a), (b), (c), and (d) in the food web shown below:
(a) |
(b) |
(c) |
(d) |
|
1. |
Dog |
Squirrel |
Bat |
Deer |
2. |
Rat |
Dog |
Tortoise |
Crow |
3. |
Squirrel |
Cat |
Rat |
Pigeon |
4. |
Deer |
Rabbit |
Frog |
Rat |
1. | Detritus | 2. | Humus |
3. | Standing state | 4. | Standing crop |
Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?
1. Phytoplankton
2. Fish
3. Zooplankton
4. Frog
(A) | removal of 80% of tigers from an area resulted in greatly increased growth of vegetation |
(B) | removal of most of the carnivores resulted in an increased population of deer |
(C) | the length of food chains is generally limited to 3-4 trophic levels due to energy |
(D) | the length of food chains may vary from 2 to 8 trophic levels |
1. B and C
2. C and D
3. A and D
4. A and B